I heard u say that in another post and was going to ask you about that but you pretty much cover it right there! Would it be ok if i did that shrimp method thing in about 4 days?? Im out of town for a few nights and wont be able to check on the tank so when i return ill be able to check the levels and all that everyday.
honestly, i would try to put it in there before you go. It really smells bad and the more days you can be away from it, the better. lol. How long are you gone for? If its only like 2-4 nights. I wouldn't sweat it. It takes a day or two for the readings to start showing up anyways. you can just test it when you get back and see where its at in the cycle. But with that being said - it doesn't matter really. you could wait 4 days if you want. it's up to you.
if you do put it in before you leave......leave a window open. lol.